Bending felly



A. W. JOHNSTON, OF ST.

GEORGES, DELAVARE.

BENDING FELLY.

Specification of Letters Patent No.

To all whom z' may concern.'

Be it known that I, ANDREW W. JOI-IN- sToN, of St. Georges, in thecounty of Newcastle and State of Delaware, have invented a new andImproved Machine for Bending F ellies for Wheels of Carriages, Wagons,and the Like; and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the accompanying drawings, forming part ofthis specification, in which- Figure l, is a plan or birds eye view.Fig. 2 is a transverse section taken at the line X, X, Fig. l.

Similar letters of reference indicate corresponding parts in each of thetwo figures.

The nature of my invention consists in forcing the felly timber eitherby steam or other power between two curved curbs, said curbs beingplaced upon a bed piece and the outer or.larger curb firmly secured toit, the felly timber after being forced between the curbs, is secured byclamps to the inner or smaller curb; and the smaller curb with the fellyattached is removed from the bed piece by withdrawing the pins or boltswhich hold it to the bed piece, the felly timber is forced out of anarrow box before entering the space between the curbs in order toprevent the bending of the timber and thus allow the power to act directupon the end of the timber, or the felly timber may pass between thefriction rollers which will answer the same purpose.

To enable others skilled in the art to malte and use invention I willproceed to describe its construction and operation.

A, represents the bed piece constructed of wood or any proper material.

B, is a narrow box placed on the bed piece and in which the felly timberJ, is placed preparatory to being forced between the curbs, and confinedby a lid Z), which is represented as being open in Fig. 1(

C, is the larger or outer curb this is little more than a half circle inshape and has a lower flanch o, through which holes are drilled and thecurb C, secured to the bed piece by bolts or screws.

D, is the inner or smaller curb this is of the precise shape of thelarger curb C, and has a flanch f, through which the bolts e, e, passand thus secure it to the bed piece;

these bolts are withdrawn and the curb D,

8,511, dated November 11, 1851.

released from the bed piece when desired. A sulicient space is leftbetween the curbs C, D, to allow the felly timber J, to pass betweenthem.

d, is a flanch on the top of the large or outer curb C, projectinginward a short distance over the space between the curbs, andconsequently over the felly J, when between them, thus preventing thefelly from being forced out at the top of the curbs.

E, is a steam cylinder on the bed piece A, and F, is a piston rod, whichpasses into the main box B, and forces out the felly timber into thespace between t-he curbs.

I-I, I-I, are clamps by which the felly is secured to the inner curbD, agood idea of them may be formed by referring to Fig. 2, a. screw bindingthe felly between one edge of the clamp and the inner curb.

Operation: The felly timber is placed in the narrow box B, and powerapplied, the rod F, acts against the end of the felly timber forcing itout of the box and between the curbs C, D, it will be seen that thefelly is prevented from bending in consequence of being confined in thebox B, and without the box or some equivalent device the felly timbercould not be forced between the curbs. When the felly is between thecurbs as seen in Fig. l, the clamps H, I-I, are applied and the fellysecured to the inner curb D as see-n in Fig. 2. It will be seen andborne in mind that the curbs C, D, form rather more than a half circle,now in order to remove the inner curb D, and felly J, which is attachedto it, a portion Gr, of the outer curb C, is moved out it beingconnected to the other part of the curb by a hinge or joint g, the boltsor pins e, e, are removed in order to release the curb D, from the bedpiece, the felly remains upon the curb till sufficiently dry to retainits shape. The object in having the curbs form rather more than a halfcircle is that the ends of the felly may be distended or sprung and forma wheel larger than the circle of which the curbs vform a part, thusdifferent sized wheels may be made of fellies bent by the same machine.

I, Fig. 2, is a catch which receives the part G, of the outer curb C, inits proper place while the felly is being forced between the curbs.

It is designed to have several inner curbs D, on hand so that themachine may not be idle in consequence of the time required in dryingthe fellies. The curbs may be constructed of such a depth as to receiveone 0r more fellies at once in Fig. 2, two felles are representedbetween the curbs.

In the ordinary method of bending fellies a cylinder is used and inturning it a roller bears against the felly by this method the outeribers 0f the timber are strained and consequently great breakage ensues.I am confident as I have practicably tested it that the fibers of thetimber are not strained so much by my machine as by the 01dmethod,

ypose substantially as described.

A. W. JOHNSTON. Witnesses:

J. B. MOORE, JAMES I-IUs'roN.

